<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="../00.依赖包/react.development.js"></script>
  <script src="../00.依赖包/react-dom.development.js"></script>
  <script src="../00.依赖包/babel.min.js"></script>
  <script src="../00.依赖包/prop-types.js"></script>
</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    /* 
       当表单的value受state控制，则我们称作为受控表单
        - 受控表单三种用法
          1. 表单的初始值受控 直接书写defaultValue属性
          2. 表单是只读表单(设置了readOnly={true}) 直接设置value也是可以的
          3. 数据双向绑定:表单通过value受控,然后需要绑定onChange事件,事件中获取当前表单的值修改state
    
    */
    class App extends React.Component{
      state={
        name:'二狗',
        age:18,
        hobby:'打牌'
      }
        render(){
          const {name,age,hobby} = this.state
          return (
            <div>
              姓名: <input type="text" value={name} onChange={this.changeName}/>
              <br/>
              年龄: <input type="text" value={age} onChange={this.changeAge}/>
              <br/>
              爱好: <input type="text" value={hobby} onChange={this.changeHobby}/>  
              <br/>
              <button onClick={this.handle}>提交</button>  
            </div>
          )
        }
        changeName=(e)=>{
          const {value} = e.target
          this.setState({name:value})
        }
        changeAge=(e)=>{
          const {value} = e.target
          this.setState({age:value})
        }
        changeHobby=(e)=>{
          const {value} = e.target
          this.setState({hobby:value})
        }
        
    }

    

    const root = ReactDOM.createRoot(document.getElementById('app'));
    root.render(<App/>)

  </script>
</body>

</html>